Using Dr Yuang's hybrid rice, nowadays farmers are producing harvests before.
A. as twice large as
B. twice as much as
C. twice as large as
D. as twice much as
网友回答
A. as twice large as
(答案→)B. twice as much as
C. twice as large as
D. as twice much as
解析：考查倍数表达法。倍数表达法：倍数 as 形容词的原级 as…；本题的twice就是倍数；形容词原级much修饰不可数名词，放在as…as…之中；句意：使用袁隆平的杂交水稻，现在农民的产量是以前的两倍。故B正确。